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Subjects
Science State Board
Class 8
Sound
Textbook questions
10.
Answer briefly III
Exercise condition:
4
m.
1. Give two differences between music and noise.
a.
The sound that gives a pleasant sensation is called
music
noise
.
b.
Noise is caused by
non periodic and irregular vibrations
periodic and regular vibrations
2. What are the hazards of noise pollution?
a.
Noise pollution is caused by
unpleasant
pleasant
sound in the environment.
b.
Long term noise exposure can impair
skin allergy
hearing ability
.
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